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ZWZA200-160 Electromagnetic Drum Brake | 160N·m, Ø200mm, DC Magnet, NC Fail-Safe, Legacy Mine Hoist & DC Crane Spare Parts
ZWZA200-160 Electromagnetic Drum Brake ✔ Pure DC, Spring-Applied, Power-Off = Brake-On Normally closed. Main spring (in closed tube, dust-proof) holds 160 N·m at JC25% / 128 N·m at JC40% . MZZ1-200 DC electromagnet only to RELEASE. Blackout / E-stop / contactor drop → spring...
Description
ZWZA200-160 Electromagnetic Drum Brake
✔ Pure DC, Spring-Applied, Power-Off = Brake-On
Normally closed. Main spring (in closed tube, dust-proof) holds 160 N·m at JC25% / 128 N·m at JC40%. MZZ1-200 DC electromagnet only to RELEASE. Blackout / E-stop / contactor drop → spring clamps Ø200 drum. No AC hum, no hydraulic oil, no air line - the classic DC fail-safe logic of legacy mine hoists.
✔ Drop-in Replacement for Old ZWZ Series
ZWZA is the modernized successor of ZWZ / ZWZ2 DC drum brakes. Base dimensions, center height, wheel Ø200, and lever geometry follow JB/ZQ4388 - same bolt pattern as thousands of in-service 1980s–2000s DC cranes, winches, and hoists. No foundation re-drill, no shaft modification.
✔ Equal-Clearance Interlock + Self-Aligning Shoes
Interlocking shoe-retraction equalizer keeps both-side clearance symmetric (auto, no manual tweak). Shoe self-aligning device prevents one-side lining drag. Armature self-seating device keeps magnet gap stable → consistent torque over life.
Products Description
The ZWZA200-160 is a DC electromagnetic drum brake of the ZWZA family - the legacy-retrofit workhorse for DC-driven lifting, mining, port, and metallurgy equipment. Where MWZ200-160 is the modern energy-saving DC brake (dual-current 2A/0.02A, 1200 cyc/h) and JZ-200 is the AC energy-saving version, ZWZA200-160 is the faithful old-spec DC brake: single-current MZZ1-200 magnet, ≤720 cyc/h, JB/ZQ4388 dimensions, built to keep 30-year-old DC hoists running with zero redesign.
It is not the highest-frequency or lowest-heat magnet on the market - it is the most familiar, most interchangeable, most spare-friendly DC brake for legacy plants.
Typical Applications:
- Mine dc hoist & incline winder - headframe safety brake, DC220V straight from Ward-Leonard set
- Legacy DC overhead crane trolley / hoist on old metallurgy shop
- Port DC grabbing crane slewing/hoist auxiliary brake
- Winch, capstan, transfer car on DC bus
- ZWZ / ZWZ2-200/200 retrofit - exact mounting swap
- DC belt conveyor stop in underground or non-sparking zone
⚙️ Technical Specifications
|
Parameter |
Value |
|---|---|
|
Model |
ZWZA200-160 |
|
Brake Type |
Normally closed, spring-applied, DC electromagnet release |
|
Brake Wheel Diameter |
Ø200 mm |
|
Rated Braking Torque |
160 N·m (JC25%) / 128 N·m (JC40%) / ~63 N·m (JC100%) |
|
Matching Electromagnet |
MZZ1-200 (DC, shunt or series coil) |
|
Coil Voltage |
DC 110V / DC 220V (standard), DC440V custom |
|
Coil Type |
Shunt (parallel) / Series - pure copper |
|
Shoe Retraction (Normal / Max) |
0.6 mm / 1.0 mm (equal-clearance interlock) |
|
Operating Frequency |
≤720 cycles/h (S3-25%/40%/60%, S1 continuous hold OK) |
|
Ambient Temp. |
-20°C ~ +40°C (std), -40°C low-temp option |
|
Humidity |
≤90% RH, no condensing |
|
Altitude |
≤2000 m |
|
Protection |
Magnet IP00 (add DKZ box for IP54), frame painted |
|
Lining |
Asbestos-free semi-metallic / soft / hard, card-mount, μ≥0.35 |
|
Total Weight |
~65 kg (brake frame + MZZ1-200) |
|
Standards |
Install dim. JB/ZQ4388 (or GB6334), tech JB/T 7685-2006 |
|
Mounting |
Horizontal base, A=270mm, left/right interchangeable |
|
Options |
DC110/220/440V coil, DKZ rectifier (AC380→DC), limit switch, manual release, Ex d coil, low-temp seal, corrosion paint |
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